Report to the honorable the Commissioners of Sewers of the City of London, upon the results of the experiment of applying charcoal to the sewer ventilators / by H. Letheby and W. Haywood.

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Report to the honorable the Commissioners of Sewers of the City of London, upon the results of the experiment of applying charcoal to the sewer ventilators / by H. Letheby and W. Haywood. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.